(Counter-) Intel question.

[Q]

I attack an enemy with several sabotage projects and spend a total of 570000 intel points per turn. My enemy produces a toal of 105000 intel points per turn (AI bonus included), which are divided among twelve counter intel projects.
All my projects are defeated over several turns. Now what I do not understand is that my enemy seems to use only about 130000 intel points to defeat all my projects (if I calculate how many points have been accumulated in his counter-intel projects from turn to turn). The Intel Defense Modifier Percent is unchanged 120, so I would expect it takes 475000 points to defeat my 570000 attacking point and not something around 130000.

Any idea what is the problem???